mobil 1 or ?
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
I ran synthetic "car oil" in my '96 RK for 106k miles. In 1998 its static compression was 155/160, in 2006 160/160--and the heads were never removed from that bike. It is still running with >115k (at last check).
Ultimate HDF Member
Joined: Feb 2007
Posts: 7,663
Likes: 7
From: Northeast Ohio
If the HD oil is good enough and keeps the engines running for 100k + miles, then giong to any premium type of synthetic may be a step above what is recommended. I do believe that a good gear oil in the tranny is preferred, but who am I to say, I have not run years worth of testing, but it works for me.
Mobil 1 20w50 or better in the engine, Redline Shockproof Heavy in the trans and Dexron III ATF in the primary and so far at 25k miles, no issues. (I have experimented with a heavier 25w60 dino engine oil, yes the lifters were a bit quieter but the engine temps were also a bit higher and consumption was a bit higher).
Put in what will make you feel good and what you think is readily available.
Mobil 1 20w50 or better in the engine, Redline Shockproof Heavy in the trans and Dexron III ATF in the primary and so far at 25k miles, no issues. (I have experimented with a heavier 25w60 dino engine oil, yes the lifters were a bit quieter but the engine temps were also a bit higher and consumption was a bit higher).
Put in what will make you feel good and what you think is readily available.
Grand HDF Member
Joined: Mar 2007
Posts: 4,928
Likes: 285
From: Edmond Oklahoma
This is a myth that has no rational foundation. There is nothing unique about an air-cooled, internal combustion engine over their water-cooled counterparts, except that the former has less control over its internal temperatures. I have a turbocharged car with an oil cooler and its oil runs as hot as my Harley, also equipped with a cooler. Other than temperature, what could be different between the two engine types? Metalurgy? No. Stress? No. Synthetic oil is designed to handle any temperature dished out by Harley engines, even when running in slow-moving, hot-summer traffic. See the articles written by the three motorcycle mags I referenced earlier.
I ran synthetic "car oil" in my '96 RK for 106k miles. In 1998 its static compression was 155/160, in 2006 160/160--and the heads were never removed from that bike. It is still running with >115k (at last check).
I ran synthetic "car oil" in my '96 RK for 106k miles. In 1998 its static compression was 155/160, in 2006 160/160--and the heads were never removed from that bike. It is still running with >115k (at last check).
That worthless fact doesn't change your point at all, just kind of something to add to the conversation to help myself feel important.
Beary
Thread Starter
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Road Warrior
Joined: May 2008
Posts: 1,287
Likes: 3
From: murfreesboro tn.
i sincerely appreciate everyones input. my service is due in a couple thousand and i beleive redline is what im going try in all the rite spots. awesome input everyone i always knew i could count on the bagger bunch!!
Supporter
Joined: Jul 2007
Posts: 2,196
Likes: 10
From: Shenandoah, TX
I run Mobil 1 20-50 in my 05 EGC for 44,000 miles, in all three holes with narry a prob. Not saying anything wrong with other weight oils in tranny and primary,just too much to keep up with in my forgetfull years.
Outstanding HDF Member
Joined: Sep 2006
Posts: 2,371
Likes: 11
From:
I use Mobil 1 vtwin, but my walmart stopped selling it. So now I use AMSoil 20-50, but I only use AMSoil 75-90 Sever Gear in the tranny. It shifts so good, I would never go back to the engine oil in the tranny. I change it every 10,000 miles. Almost no shavings at all on the drain plug.
Grand HDF Member
Joined: Sep 2005
Posts: 4,890
Likes: 73
From: MA
HD Syn 3 IS a semi syn.
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